USAF · 1947 to 1969

Project Blue Book Case Files

The U.S. Air Force's 22-year investigation into reported UFO incidents, drawn from the National Archives. Each case below has a journalistic summary written from the original file. Use the search box to find a place or date, or filter by state and year.

StateOH 371 CA 274 TX 242 NY 167 FL 110 NM 92 MI 90 WA 89 IL 81 PA 78 MD 73 CO 72

Year1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969

Clear filters ✕

5 cases in CO from 1958 · page 1 of 1

Camp Carson, CO
1958 · unidentified
On February 1, 1958, at Camp Carson, Colorado, a civilian reported seeing four distinct parallel lines burning like flares and pointing downward. The object was about the size of a…
Denver, CO
1958 · unidentified
On the evening of August 31, 1958, a civilian businessman in Denver, Colorado saw three reddish-orange objects about the size of a baseball moving in an almost straight line across…
Derby, CO
1958 · unidentified
Between September 18 and October 20, 1958, a civilian in Derby, Colorado, took a 35mm color slide of a B-47 vapor trail in a southwest direction from his home. When he later projec…
Lowry AFB, CO
1958 · unidentified
On April 3, 1958, shortly after sunset near Lowry Air Force Base in Colorado, two experienced Air Force officers spotted an unusual object moving smoothly across the northwestern s…
Pueblo, CO
1958 · unidentified
On the morning of June 14, 1958, a weather observer at Pueblo, Colorado spotted an unusual object while tracking a pilot balloon with a theodolite (a surveying instrument used to m…

Browse sightings by state

Browse sightings by year

1947 51 1948 90 1949 236 1950 167 1951 124 1952 471 1953 326 1954 350 1955 344 1956 417 1957 559 1958 359 1959 268 1960 340 1961 408 1962 346 1963 123

Camp Carson, CO

Denver, CO

Derby, CO

Lowry AFB, CO

Pueblo, CO